./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_fb15c03a-0e03-4379-8d15-8fabc8bd3d8f/bin/ukojak/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_fb15c03a-0e03-4379-8d15-8fabc8bd3d8f/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_fb15c03a-0e03-4379-8d15-8fabc8bd3d8f/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_fb15c03a-0e03-4379-8d15-8fabc8bd3d8f/bin/ukojak/config/KojakMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i -s /tmp/vcloud-vcloud-master/worker/working_dir_fb15c03a-0e03-4379-8d15-8fabc8bd3d8f/bin/ukojak/config/svcomp-DerefFreeMemtrack-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_fb15c03a-0e03-4379-8d15-8fabc8bd3d8f/bin/ukojak --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash efc45e5708d4a9b560055cd5abf7b168f9024833 ................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 10:11:28,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 10:11:28,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 10:11:28,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 10:11:28,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 10:11:28,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 10:11:28,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 10:11:28,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 10:11:28,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 10:11:28,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 10:11:28,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 10:11:28,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 10:11:28,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 10:11:28,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 10:11:28,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 10:11:28,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 10:11:28,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 10:11:28,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 10:11:28,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 10:11:28,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 10:11:28,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 10:11:28,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 10:11:28,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 10:11:28,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 10:11:28,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 10:11:28,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 10:11:28,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 10:11:28,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 10:11:28,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 10:11:28,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 10:11:28,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 10:11:28,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 10:11:28,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 10:11:28,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 10:11:28,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 10:11:28,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 10:11:28,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 10:11:28,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 10:11:28,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 10:11:28,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 10:11:28,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 10:11:28,230 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_fb15c03a-0e03-4379-8d15-8fabc8bd3d8f/bin/ukojak/config/svcomp-DerefFreeMemtrack-32bit-Kojak_Default.epf [2019-10-22 10:11:28,242 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 10:11:28,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 10:11:28,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 10:11:28,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 10:11:28,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 10:11:28,249 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 10:11:28,249 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 10:11:28,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 10:11:28,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 10:11:28,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 10:11:28,249 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-10-22 10:11:28,250 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-10-22 10:11:28,250 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-10-22 10:11:28,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 10:11:28,250 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 10:11:28,250 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 10:11:28,250 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2019-10-22 10:11:28,251 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2019-10-22 10:11:28,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 10:11:28,251 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 10:11:28,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2019-10-22 10:11:28,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 10:11:28,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 10:11:28,252 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2019-10-22 10:11:28,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 10:11:28,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_fb15c03a-0e03-4379-8d15-8fabc8bd3d8f/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efc45e5708d4a9b560055cd5abf7b168f9024833 [2019-10-22 10:11:28,283 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 10:11:28,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 10:11:28,299 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 10:11:28,300 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 10:11:28,300 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 10:11:28,301 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_fb15c03a-0e03-4379-8d15-8fabc8bd3d8f/bin/ukojak/../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2019-10-22 10:11:28,355 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_fb15c03a-0e03-4379-8d15-8fabc8bd3d8f/bin/ukojak/data/932e201b1/4593af06e5f346049adf4292329d6a3b/FLAGea16650eb [2019-10-22 10:11:28,784 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 10:11:28,785 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_fb15c03a-0e03-4379-8d15-8fabc8bd3d8f/sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2019-10-22 10:11:28,794 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_fb15c03a-0e03-4379-8d15-8fabc8bd3d8f/bin/ukojak/data/932e201b1/4593af06e5f346049adf4292329d6a3b/FLAGea16650eb [2019-10-22 10:11:28,805 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_fb15c03a-0e03-4379-8d15-8fabc8bd3d8f/bin/ukojak/data/932e201b1/4593af06e5f346049adf4292329d6a3b [2019-10-22 10:11:28,807 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 10:11:28,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 10:11:28,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 10:11:28,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 10:11:28,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 10:11:28,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:11:28" (1/1) ... [2019-10-22 10:11:28,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f816124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:28, skipping insertion in model container [2019-10-22 10:11:28,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:11:28" (1/1) ... [2019-10-22 10:11:28,822 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 10:11:28,853 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 10:11:29,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 10:11:29,150 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 10:11:29,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 10:11:29,248 INFO L192 MainTranslator]: Completed translation [2019-10-22 10:11:29,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:29 WrapperNode [2019-10-22 10:11:29,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 10:11:29,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 10:11:29,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 10:11:29,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 10:11:29,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:29" (1/1) ... [2019-10-22 10:11:29,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:29" (1/1) ... [2019-10-22 10:11:29,295 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 10:11:29,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 10:11:29,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 10:11:29,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 10:11:29,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:29" (1/1) ... [2019-10-22 10:11:29,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:29" (1/1) ... [2019-10-22 10:11:29,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:29" (1/1) ... [2019-10-22 10:11:29,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:29" (1/1) ... [2019-10-22 10:11:29,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:29" (1/1) ... [2019-10-22 10:11:29,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:29" (1/1) ... [2019-10-22 10:11:29,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:29" (1/1) ... [2019-10-22 10:11:29,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 10:11:29,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 10:11:29,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 10:11:29,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 10:11:29,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:11:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fb15c03a-0e03-4379-8d15-8fabc8bd3d8f/bin/ukojak/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2019-10-22 10:11:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 10:11:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 10:11:29,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 10:11:29,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 10:11:29,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 10:11:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 10:11:29,866 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 10:11:29,866 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-22 10:11:29,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:11:29 BoogieIcfgContainer [2019-10-22 10:11:29,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 10:11:29,868 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2019-10-22 10:11:29,868 INFO L271 PluginConnector]: Initializing CodeCheck... [2019-10-22 10:11:29,880 INFO L275 PluginConnector]: CodeCheck initialized [2019-10-22 10:11:29,880 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:11:29" (1/1) ... [2019-10-22 10:11:29,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 10:11:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:29,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 31 states and 34 transitions. [2019-10-22 10:11:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-10-22 10:11:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-10-22 10:11:29,929 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 30 states and 33 transitions. [2019-10-22 10:11:30,131 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-10-22 10:11:30,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-10-22 10:11:30,132 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 32 states and 37 transitions. [2019-10-22 10:11:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-10-22 10:11:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-10-22 10:11:30,487 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:30,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 31 states and 36 transitions. [2019-10-22 10:11:30,524 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-10-22 10:11:30,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-10-22 10:11:30,524 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:30,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 32 states and 38 transitions. [2019-10-22 10:11:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-10-22 10:11:30,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 10:11:30,873 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:30,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 33 states and 39 transitions. [2019-10-22 10:11:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-10-22 10:11:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 10:11:30,970 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:31,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 34 states and 42 transitions. [2019-10-22 10:11:31,279 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2019-10-22 10:11:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 10:11:31,280 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:32,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:32,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 37 states and 49 transitions. [2019-10-22 10:11:32,066 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2019-10-22 10:11:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 10:11:32,067 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 38 states and 51 transitions. [2019-10-22 10:11:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2019-10-22 10:11:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 10:11:32,434 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:32,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 37 states and 50 transitions. [2019-10-22 10:11:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2019-10-22 10:11:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 10:11:32,475 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 36 states and 49 transitions. [2019-10-22 10:11:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 49 transitions. [2019-10-22 10:11:32,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 10:11:32,856 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:33,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 29 states and 34 transitions. [2019-10-22 10:11:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-22 10:11:33,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 10:11:33,257 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 26 states and 30 transitions. [2019-10-22 10:11:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-22 10:11:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 10:11:33,300 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:33,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 25 states and 28 transitions. [2019-10-22 10:11:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-22 10:11:33,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 10:11:33,362 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:11:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:11:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:11:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 26 states and 29 transitions. [2019-10-22 10:11:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-10-22 10:11:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 10:11:33,613 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:11:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:11:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:11:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:11:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:11:33,719 WARN L489 CodeCheckObserver]: This program is UNSAFE, Check terminated with 15 iterations. [2019-10-22 10:11:33,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 22.10 10:11:33 ImpRootNode [2019-10-22 10:11:33,781 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2019-10-22 10:11:33,782 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 10:11:33,782 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 10:11:33,782 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 10:11:33,782 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:11:29" (3/4) ... [2019-10-22 10:11:33,785 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 10:11:33,855 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_fb15c03a-0e03-4379-8d15-8fabc8bd3d8f/bin/ukojak/witness.graphml [2019-10-22 10:11:33,855 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 10:11:33,857 INFO L168 Benchmark]: Toolchain (without parser) took 5047.88 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 228.6 MB). Free memory was 939.1 MB in the beginning and 951.8 MB in the end (delta: -12.7 MB). Peak memory consumption was 215.9 MB. Max. memory is 11.5 GB. [2019-10-22 10:11:33,857 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 964.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 10:11:33,858 INFO L168 Benchmark]: CACSL2BoogieTranslator took 439.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.1 MB). Free memory was 939.1 MB in the beginning and 1.1 GB in the end (delta: -207.1 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-10-22 10:11:33,858 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 10:11:33,859 INFO L168 Benchmark]: Boogie Preprocessor took 29.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2019-10-22 10:11:33,859 INFO L168 Benchmark]: RCFGBuilder took 542.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 39.2 MB). Peak memory consumption was 39.2 MB. Max. memory is 11.5 GB. [2019-10-22 10:11:33,860 INFO L168 Benchmark]: CodeCheck took 3913.46 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 64.5 MB). Free memory was 1.1 GB in the beginning and 954.5 MB in the end (delta: 147.4 MB). Peak memory consumption was 211.9 MB. Max. memory is 11.5 GB. [2019-10-22 10:11:33,860 INFO L168 Benchmark]: Witness Printer took 73.31 ms. Allocated memory is still 1.3 GB. Free memory was 954.5 MB in the beginning and 951.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-10-22 10:11:33,864 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 1 procedures, 31 locations, 16 error locations. Result: UNSAFE, OverallTime: 3.8s, OverallIterations: 15, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 33104 SDtfs, 44484 SDslu, 20800 SDs, 0 SdLazy, 214178 SolverSat, 76602 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 608 GetRequests, 516 SyntacticMatches, 10 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2596 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 1736 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 12 PerfectInterpolantSequences, 7/10 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - CounterExampleResult [Line: 537]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; [L521] COND FALSE !(i < length - 1) [L526] nondetString[length-1] = '\0' [L527] return nondetString; [L536] char* s = build_nondet_String(); [L531] EXPR \read(*s) [L531] *s != '\0' && *s != (char)c [L531] COND FALSE !(*s != '\0' && *s != (char)c) [L533] EXPR \read(*s) [L533] EXPR (*s == c) ? (char *) s : 0 [L533] return ( (*s == c) ? (char *) s : 0 ); * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 964.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 439.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.1 MB). Free memory was 939.1 MB in the beginning and 1.1 GB in the end (delta: -207.1 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 45.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 542.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 39.2 MB). Peak memory consumption was 39.2 MB. Max. memory is 11.5 GB. * CodeCheck took 3913.46 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 64.5 MB). Free memory was 1.1 GB in the beginning and 954.5 MB in the end (delta: 147.4 MB). Peak memory consumption was 211.9 MB. Max. memory is 11.5 GB. * Witness Printer took 73.31 ms. Allocated memory is still 1.3 GB. Free memory was 954.5 MB in the beginning and 951.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...